J. K. Kohli, B. K. Tyagi, D. Singh, Jeetendra Aggarwal
June 6, 2014

### Abstract

A new class of functions called ‘R δ -supercontinuous functions’ is introduced. Their basic properties are studied and their place in the hierarchy of strong variants of continuity which already exist in the literature is elaborated. The class of Rδ-supercontinuous functions (Math. Bohem., to appear) properly contains the class of R z -supercontinuous functions which in its turn properly contains the class of R cl - supercontinuous functions (Demonstratio Math. 46(1) (2013), 229-244) and so includes all R cl -supercontinuous (≡clopen continuous) functions (Applied Gen. Topol. 8(2) (2007), 293-300; Indian J. Pure Appl. Math. 14(6) (1983), 767-772) and is properly contained in the class of R-supercontinuous functions (Demonstratio Math. 43(3) (2010), 703-723).